Cake Fillings

I have a wedding cake coming up and the bride wants a tier to have strawberry filling, and another to have lemon filling. These two tiers are the largest and I don't have the refrigerator space for the cakes. The recipes I would use both need to be refrigerated. Does anyone have a good recipe that wouldn't have to be kept in the fridge??

I dont have a recipe but when need a filling that does call for refrigeration, i use the sleeve fillings. You can find them almost in any cake supply store or online as well. They tase great and its a no-hassle filling.